Inzwa ye-oxygen yemoto.
Inzwa ye-oxygen yemoto iyinzwa esemqoka yempendulo ohlelweni lokulawula injini ye-EFI, futhi iyingxenye ebalulekile yokulawula ukukhishwa kwegesi yemoto, ukunciphisa ukungcoliswa kwemvelo yemoto kanye nokwenza ngcono ikhwalithi yokushiswa kukaphethiloli yenjini yemoto.
Kunezinhlobo ezimbili zezinzwa zomoya-mpilo, i-zirconia ne-titanium dioxide.
Inzwa ye-oksijeni ukusetshenziswa kwezakhi ezibucayi ze-ceramic ukukala amandla komoya-mpilo ezithandweni zokushisa ezihlukahlukene noma amapayipi okukhipha umoya, ukubala ukuhlushwa komoya-mpilo okuhambisanayo ngesimiso sokulinganisela kwamakhemikhali, ukuqapha nokulawula isilinganiso sokushiswa komoya-kaphethiloli esithandweni somlilo, ukuze kuqinisekwe. ikhwalithi yomkhiqizo kanye nezindinganiso zokukhipha umoya wezinto zokulinganisa, ezisetshenziswa kabanzi kuzo zonke izinhlobo zokuvutha kwamalahle, ukushiswa kukawoyela, ukushiswa kwegesi nokunye. ukulawulwa komkhathi wesithando somlilo.
Inzwa ye-oxygen isetshenziselwa ukulawula nge-elekthronikhi isistimu yokulawula impendulo yedivayisi yomjovo kaphethiloli ukuze kutholwe ukugcwala komoyampilo kugesi ephumayo kanye nokuminyana kwesilinganiso sikaphethiloli womoya, ukuqapha isilinganiso sethiyori somoya-fuel (14.7:1) enjinini, kanye nokuthumela amasignali empendulo kukhompuyutha.
Isimiso sokusebenza
Inzwa yomoya-mpilo isebenza ngendlela efanayo nebhethri, kanye ne-elementi ye-zirconia esenzwa esebenza njenge-electrolyte. Umgomo oyisisekelo wokusebenza uthi: ngaphansi kwezimo ezithile (ukushisa okuphezulu kanye ne-platinum catalysis), umehluko wokuhlushwa komoyampilo phakathi kwengaphakathi nangaphandle kwe-Hao oxide usetshenziselwa ukukhiqiza umehluko ongaba khona, futhi uma umehluko omkhulu wokugxilisa ingqondo, umehluko omkhulu ongaba khona. . Okuqukethwe komoyampilo emkhathini kungama-21%, igesi ephumayo ngemva kokuvutha okugxilile empeleni ayinawo umoya-mpilo, futhi igesi yokukhipha umoya ekhiqizwe ngemva kokushiswa kwengxube ye-dilute noma igesi yokukhipha umoya ekhiqizwe ukuntuleka komlilo iqukethe i-oxygen eyengeziwe, kodwa usengaphansi kakhulu kunomoya-mpilo osemkhathini.
Ngaphansi kwe-catalysis yokushisa okuphezulu ne-platinum, umoya-mpilo oxhunywe kwinzwa ye-oxygen uyadliwa, ngakho umehluko we-voltage uyakhiqizwa, i-voltage ephumayo yengxube egxiliwe iseduze ne-1V, futhi ingxube ye-dilute iseduze ne-0V. Ngokuvumelana nesignali ye-voltage yenzwa ye-oxygen, isilinganiso se-air-fuel silawulwa ukuze kulungiswe ububanzi be-pulse umjovo kaphethiloli, ngakho-ke ukulawulwa kwe-elekthronikhi kwenzwa ye-oxygen iyinzwa eyinhloko yokulinganisa uphethiloli. Inzwa ye-oxygen ingabonakala ngokugcwele emazingeni okushisa aphezulu (ukuphela kufinyelela ngaphezu kuka-300 ° C) futhi ingakhipha i-voltage. Isabela ngokushesha kakhulu ekushintsheni kwengxube cishe ku-800 ° C.
Amathiphu
Inzwa ye-oxygen ye-zirconium dioxide ibonisa ukuguqulwa kokugxila kwengxube evuthayo ngokushintsha kwamandla kagesi, futhi inzwa ye-oxygen ye-titanium dioxide ibonisa ukuguqulwa kwengxube evuthayo ngokushintsha ukumelana. Isistimu yokulawula ye-elekthronikhi esebenzisa inzwa ye-oxygen ye-zirconia ayikwazi ukulawula isilinganiso sangempela sikaphethiloli womoya eduze nesilinganiso sethiyori yomoya-fuel lapho isimo sokusebenza kwenjini siwohloka, kuyilapho inzwa ye-oxygen ye-titanium dioxide ingakwazi futhi ukulawula isilinganiso sangempela sikaphethiloli womoya eduze nethiyori. isilinganiso sikaphethiloli womoya lapho isimo sokusebenza kwenjini siwohloka.
Ivolumu yomjovo (ububanzi be-injection pulse) elungiswa yiyunithi yokulawula ngesikhathi esifushane ngokusho kwesignali yenzwa ye-oxygen ibizwa ngokuthi ukulungiswa kwe-fuel term-term, okulawulwa yi-voltage ephumayo yenzwa ye-oxygen.
Ukulungiswa kukaphethiloli kwesikhathi eside yinani elinqunywa ukuguqulwa kweyunithi yokulawula yesakhiwo sedatha yokusebenza yeyunithi ngokuya ngoshintsho lwe-coefficient yokulungisa uphethiloli yesikhashana.
Iphutha elivamile
Lapho inzwa ye-oxygen ihluleka, ikhompyutha yesistimu yomjovo kaphethiloli we-elekthronikhi ayikwazi ukuthola ulwazi lokuhlushwa komoya-mpilo epayipini lokukhipha umoya, ngakho-ke ayikwazi ukulawula isilinganiso se-air-fuel, okuzokwandisa ukusetshenziswa kukaphethiloli we-injini kanye nokukhipha ukungcola, futhi injini izovela isivinini esingazinzile sokungenzi lutho, ukuntuleka komlilo, ukuqhuma nezinye izenzakalo zephutha. Ngakho-ke, iphutha kufanele lisuswe noma lishintshwe ngesikhathi esifanele [1].
Iphutha lobuthi
Ubuthi benzwa ye-oksijini buvame futhi kunzima ukuvimbela ukwehluleka, ikakhulukazi ukusetshenziswa njalo kwezimoto zikaphethiloli onomthofu, ngisho nenzwa entsha ye-oxygen, ingasebenza kuphela amakhilomitha ayizinkulungwane ezimbalwa. Uma kuwubuthi obuncane bomthofu, khona-ke ukusebenzisa ithangi likaphethiloli ongenawo umthofu kungasusa umthofu ebusweni benzwa yomoya-mpilo futhi kuwubuyisele ekusebenzeni okuvamile. Kodwa-ke, ngokuvamile ngenxa yokushisa okuphezulu kwe-exhaust, umthofu ungena ngaphakathi kwawo, uvimbela ukusakazeka kwama-ion oksijini, okwenza inzwa ye-oxygen ingasebenzi, ngaleso sikhathi ingashintshwa kuphela.
Ngaphezu kwalokho, ubuthi be-silicon bezinzwa zomoya-mpilo nakho kuyisenzakalo esivamile. Ngokuvamile, i-silica ekhiqizwa ngemva kokushiswa kwezinhlanganisela ze-silicon eziqukethwe kuphethiloli namafutha okugcoba, kanye negesi ye-silicone ekhishwa ukusetshenziswa okungalungile kwama-gaskets okuvalwa kwerabha ye-silicone izokwenza inzwa ye-oxygen ihluleke, ngakho-ke kufanele kusetshenziswe uphethiloli wekhwalithi enhle namafutha okugcoba. .
Lapho ulungisa, kuyadingeka ukukhetha kahle futhi ufake ama-gaskets enjoloba, ungasebenzisi ama-solvents nama-anti-stick agents ngaphandle kwalawo ashiwo umenzi ku-sensor, njll. Ngenxa yokusha kwenjini okungalungile, amadiphozi ekhabhoni akhiwa ebusweni inzwa ye-oxygen, noma uwoyela noma uthuli nezinye izinsalela zingeniswa ngaphakathi kwenzwa ye-oxygen, ezovimbela noma ivimbele umoya wangaphandle ungene ngaphakathi kwenzwa ye-oxygen, ukuze isignali yokuphuma kwenzwa ye-oxygen ingahambelani. I-ECU ayikwazi ukulungisa isilinganiso se-air-fuel ngesikhathi. Ukukhiqizwa kwamadiphozithi ekhabhoni kubonakala ngokuyinhloko njengokwenyuka kokusetshenziswa kukaphethiloli kanye nokwanda okuphawulekayo kokugxilisa ukungcola. Ngalesi sikhathi, uma i-sediment isusiwe, izobuyela emsebenzini ojwayelekile.
Ukuqhekeka kwe-Ceramic
I-ceramic yenzwa ye-oxygen iqinile futhi iyaphuka, futhi ukungqongqoza ngezinto eziqinile noma ukuvunguza ngokugeleza komoya okunamandla kungase kuyenze idilike futhi yehluleke. Ngakho-ke, kudingekile ukuba uqaphele ikakhulukazi lapho ubhekana nezinkinga futhi uzibuyisele ngesikhathi.
I-block wire ishisiwe
Intambo yokumelana ne-heater ishisiwe. Ngenzwa ye-oksijeni eshisayo, uma ucingo lokumelana nokushisa lushiswa, kunzima ukwenza inzwa ifinyelele izinga lokushisa elivamile lokusebenza futhi ilahlekelwe umsebenzi wayo.
Ukunqanyulwa komugqa
Umjikelezo wangaphakathi wenzwa ye-oxygen unqanyuliwe.
Indlela yokuhlola
Hlola ukumelana nokushisa
Khipha ipulaki yehhanisi lenzwa yomoya-mpilo, futhi usebenzise i-multimeter ukuze ulinganise ukumelana phakathi kwesigxobo se-heater nesigxobo sensimbi kutheminali yenzwa yomoya-mpilo. Inani lokumelana ngu-4-40Ω(bheka imiyalelo yemodeli ethile). Uma ingahlangabezani nendinganiso, buyisela inzwa ye-oxygen.
Ukulinganiswa kwevoltage yempendulo
Lapho kulinganiswa i-voltage yempendulo yenzwa yomoya-mpilo, ipulaki yehhanisi lenzwa yomoya-mpilo kufanele inqanyulwe, futhi ucingo oluncane kufanele ludonswe kutheminali yokukhiphayo yevoltheji yempendulo yenzwa yomoya-mpilo ngokomdwebo wesifunda wemodeli, futhi bese ixhunywa ipulaki yamahanisi. I-voltage yempendulo ingalinganiswa kusukela emugqeni oholayo phakathi nokusebenza kwenjini (amanye amamodeli angaphinda alinganise umthamo wempendulo yenzwa yomoya-mpilo kusukela kusokhethi yokuthola iphutha). Isibonelo, uchungechunge lwezimoto ezikhiqizwe i-Toyota Motor Company lungalinganisa i-voltage yempendulo yenzwa yomoya-mpilo ngokuqondile ukusuka kumatheminali we-OX1 noma we-OX2 kusokhethi yokuthola amaphutha).
Lapho ukala i-voltage yempendulo yenzwa ye-oxygen, kungcono kakhulu ukusebenzisa i-multimeter yohlobo lwesikhombi enobubanzi obuphansi (imvamisa engu-2V) kanye ne-impedance ephezulu (ukumelana kwangaphakathi okukhulu kuno-10MΩ). Izindlela eziqondile zokubona zimi kanje:
1. Vula injini ishise ibe yizinga lokushisa elivamile lokusebenza (noma ugijime ku-2500r/min ngemva kokuqala i-2min);
2. Xhuma ipeni elinegethivu le-multimeter voltage stop ku-E1 noma i-electrode eyinegethivu yebhethri kusokhethi yokuthola iphutha, kanye nepeni ephozithivu kujack ye-OX1 noma i-OX2 kusokhethi yokuthola amaphutha, noma enombolweni | kupulaki yezintambo zokubopha inzwa ye-oxygen.
3, vumela injini iqhubeke isebenza ngesivinini esingaba ngu-2500r/min, futhi uhlole ukuthi isikhombisi se-voltmeter singakwazi yini ukushwiba siye emuva naphambili phakathi kuka-0-1V, futhi sirekhode inani lokujika kwe-voltmeter pointer phakathi kwama-10s. Ngaphansi kwezimo ezijwayelekile, ngokuqhubeka kokulawulwa kwempendulo, i-voltage yempendulo yenzwa yomoya-mpilo izolokhu ishintsha ngaphezulu nangaphansi kuka-0.45V, futhi i-voltage yempendulo kufanele ishintshe izikhathi ezingekho ngaphansi kuka-8 phakathi kwama-10s.
Uma kungaphansi kwezikhathi ezingu-8, kusho ukuthi inzwa ye-oxygen noma isistimu yokulawula impendulo ayisebenzi kahle, okungenzeka kubangelwe ukunqwabelana kwekhabhoni ebusweni benzwa ye-oxygen, ukuze ukuzwela kuncishiswe. Kulokhu, injini kufanele isebenze ku-2500r/min cishe imizuzu emi-2 ukuze kukhishwe amadiphozithi e-carbon ebusweni benzwa ye-oxygen, bese uhlola i-voltage yempendulo. Uma isikhombisi se-voltmeter sisashintsha kancane ngemva kokukhishwa kwekhabhoni, sibonisa ukuthi inzwa ye-oxygen ilimele, noma isifunda sokulawula impendulo yekhompyutha sinephutha.
4, ukuhlolwa kombala kwenzwa ye-oxygen
Susa inzwa ye-oxygen epayipini lokukhipha umoya bese uhlola ukuthi imbobo yokukhipha umoya kundlu yezinzwa ivinjiwe futhi i-ceramic core yonakalisiwe. Uma konakele, buyisela inzwa ye-oxygen.
Amaphutha angaphinde anqunywe ngokubheka umbala wengxenye ephezulu yenzwa ye-oxygen:
1, phezulu okumpunga okukhanyayo: lona umbala ojwayelekile wenzwa yomoya-mpilo;
2, phezulu okumhlophe: okubangelwa ukungcoliswa kwe-silicon, inzwa ye-oxygen kumele ishintshwe ngalesi sikhathi;
I-3, i-brown top (njengoba kuboniswe kuMfanekiso 1) : okubangelwa ukungcoliswa komthofu, uma kubi kakhulu, kufanele futhi kuthathe indawo yenzwa ye-oxygen;
(4) Ingaphezulu elimnyama: okubangelwa ukufakwa kwekhabhoni, ngemva kokuqeda iphutha le-carbon deposition yenjini, ukufakwa kwe-carbon kwinzwa ye-oxygen ngokuvamile kungasuswa ngokuzenzakalelayo.
Uma ufuna ukwazi okwengeziwe, qhubeka ufunda ezinye izihloko kule sayithi!
Sicela usishayele uma udinga imikhiqizo enjalo.
Inkampani Zhuo Meng Shanghai Auto Co., Ltd.uzibophezele ekuthengiseni izingxenye zezimoto ze-MG&MAUXS zamukelekileukuthenga.
